| Research Abstract |
The purpose of this study is to synthesize multifunctional complexes with diarylethene, i,e., porous photochromic complexes which reversibly incoorpolate guest molecules in the cavity, using the structural change between ring ring-open and ring-closed forms of photochromic diarylethene.
(1)Reversible incoorpolation of guest molecules in porous photochromic complexes. We succeeded in synthesizing porous photochromic metal complexes with 2,3-bis(2,4,5-trimethyl-3-thienyl)maleimide(bttm), [Ag(bttm)(CF_3COO)] (1) h [Ag(closed-bttm)(CF_3COO)] (2),which have channels of 7.0×7.9Å and 7.5×7.6Åsizes, respectively. Reversible incoorpolation and elimination of guest molecules in the porous complexes was studied by means of TG, X-ray powder pattern and ^1H NMR spectrum. Complex 1 takes in 0.4 molar pentane and about 75% of this pentane is desorbed by heating at 120℃. On the other hand, complex 2 takes in 1.9 molar pentane which is completely desorbed by the light irradiation as well as by heating at 130℃, indicating the possibility of light-triggered inclusion of guest molecules.
(2)Synthesis of novel photochromic and porous complexes. Diarylethene derivatives with pyridine rings which is easily coordinated to metal ions, 1,2-bis(2'-methyl-5'-(4''-pyridyl)-3'-thienyl)perfluorocyclopentene(BM-4-PTP), 1, 2-bis(3-methyl-5'-(2''-pyridyl)-2'-thienyl)perfluorocyclopentene(BM-2-PTP) and their photochromic copper(II)complex,[Cu(BM-4-PTP)_2(CF_3COO)_2]・2H_2O・2THF and [Ag_2(BM-2-PTP)(CF_3COO_2](C_6H_6), were synthesized in order to construct novel complexes with light-triggered inclusion function of guest molecules.
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